ICU 71.1 71.1

utext.h
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1 // © 2016 and later: Unicode, Inc. and others.
2 // License & terms of use: http://www.unicode.org/copyright.html
3 /*
4 *******************************************************************************
5 *
6 * Copyright (C) 2004-2012, International Business Machines
7 * Corporation and others. All Rights Reserved.
8 *
9 *******************************************************************************
10 * file name: utext.h
11 * encoding: UTF-8
12 * tab size: 8 (not used)
13 * indentation:4
14 *
15 * created on: 2004oct06
16 * created by: Markus W. Scherer
17 */
18
19 #ifndef __UTEXT_H__
20 #define __UTEXT_H__
21
140 #include "unicode/utypes.h"
141 #include "unicode/uchar.h"
142 #if U_SHOW_CPLUSPLUS_API
143 #include "unicode/localpointer.h"
144 #include "unicode/rep.h"
145 #include "unicode/unistr.h"
146 #include "unicode/chariter.h"
147 #endif
148
149
150 U_CDECL_BEGIN
151
152 struct UText;
153 typedef struct UText UText;
156 /***************************************************************************************
157 *
158 * C Functions for creating UText wrappers around various kinds of text strings.
159 *
160 ****************************************************************************************/
161
162
183 U_CAPI UText * U_EXPORT2
184 utext_close(UText *ut);
185
207 U_CAPI UText * U_EXPORT2
208 utext_openUTF8(UText *ut, const char *s, int64_t length, UErrorCode *status);
209
210
225 U_CAPI UText * U_EXPORT2
226 utext_openUChars(UText *ut, const UChar *s, int64_t length, UErrorCode *status);
227
228
229 #if U_SHOW_CPLUSPLUS_API
230
242 U_CAPI UText * U_EXPORT2
243 utext_openUnicodeString(UText *ut, icu::UnicodeString *s, UErrorCode *status);
244
245
258 U_CAPI UText * U_EXPORT2
259 utext_openConstUnicodeString(UText *ut, const icu::UnicodeString *s, UErrorCode *status);
260
261
274 U_CAPI UText * U_EXPORT2
275 utext_openReplaceable(UText *ut, icu::Replaceable *rep, UErrorCode *status);
276
289 U_CAPI UText * U_EXPORT2
290 utext_openCharacterIterator(UText *ut, icu::CharacterIterator *ci, UErrorCode *status);
291
292 #endif
293
294
352 U_CAPI UText * U_EXPORT2
353 utext_clone(UText *dest, const UText *src, UBool deep, UBool readOnly, UErrorCode *status);
354
355
367 U_CAPI UBool U_EXPORT2
368 utext_equals(const UText *a, const UText *b);
369
370
371 /*****************************************************************************
372 *
373 * Functions to work with the text represented by a UText wrapper
374 *
375 *****************************************************************************/
376
388 U_CAPI int64_t U_EXPORT2
389 utext_nativeLength(UText *ut);
390
404 U_CAPI UBool U_EXPORT2
405 utext_isLengthExpensive(const UText *ut);
406
432 U_CAPI UChar32 U_EXPORT2
433 utext_char32At(UText *ut, int64_t nativeIndex);
434
435
446 U_CAPI UChar32 U_EXPORT2
447 utext_current32(UText *ut);
448
449
468 U_CAPI UChar32 U_EXPORT2
469 utext_next32(UText *ut);
470
471
489 U_CAPI UChar32 U_EXPORT2
490 utext_previous32(UText *ut);
491
492
511 U_CAPI UChar32 U_EXPORT2
512 utext_next32From(UText *ut, int64_t nativeIndex);
513
514
515
531 U_CAPI UChar32 U_EXPORT2
532 utext_previous32From(UText *ut, int64_t nativeIndex);
533
546 U_CAPI int64_t U_EXPORT2
547 utext_getNativeIndex(const UText *ut);
548
572 U_CAPI void U_EXPORT2
573 utext_setNativeIndex(UText *ut, int64_t nativeIndex);
574
591 U_CAPI UBool U_EXPORT2
592 utext_moveIndex32(UText *ut, int32_t delta);
593
616 U_CAPI int64_t U_EXPORT2
617 utext_getPreviousNativeIndex(UText *ut);
618
619
654 U_CAPI int32_t U_EXPORT2
655 utext_extract(UText *ut,
656 int64_t nativeStart, int64_t nativeLimit,
657 UChar *dest, int32_t destCapacity,
658 UErrorCode *status);
659
660
661
662 /************************************************************************************
663 *
664 * #define inline versions of selected performance-critical text access functions
665 * Caution: do not use auto increment++ or decrement-- expressions
666 * as parameters to these macros.
667 *
668 * For most use, where there is no extreme performance constraint, the
669 * normal, non-inline functions are a better choice. The resulting code
670 * will be smaller, and, if the need ever arises, easier to debug.
671 *
672 * These are implemented as #defines rather than real functions
673 * because there is no fully portable way to do inline functions in plain C.
674 *
675 ************************************************************************************/
676
677 #ifndef U_HIDE_INTERNAL_API
678
687 #define UTEXT_CURRENT32(ut) \
688 ((ut)->chunkOffset < (ut)->chunkLength && ((ut)->chunkContents)[(ut)->chunkOffset]<0xd800 ? \
689 ((ut)->chunkContents)[((ut)->chunkOffset)] : utext_current32(ut))
690 #endif /* U_HIDE_INTERNAL_API */
691
703 #define UTEXT_NEXT32(ut) \
704 ((ut)->chunkOffset < (ut)->chunkLength && ((ut)->chunkContents)[(ut)->chunkOffset]<0xd800 ? \
705 ((ut)->chunkContents)[((ut)->chunkOffset)++] : utext_next32(ut))
706
717 #define UTEXT_PREVIOUS32(ut) \
718 ((ut)->chunkOffset > 0 && \
719 (ut)->chunkContents[(ut)->chunkOffset-1] < 0xd800 ? \
720 (ut)->chunkContents[--((ut)->chunkOffset)] : utext_previous32(ut))
721
734 #define UTEXT_GETNATIVEINDEX(ut) \
735 ((ut)->chunkOffset <= (ut)->nativeIndexingLimit? \
736 (ut)->chunkNativeStart+(ut)->chunkOffset : \
737 (ut)->pFuncs->mapOffsetToNative(ut))
738
750 #define UTEXT_SETNATIVEINDEX(ut, ix) UPRV_BLOCK_MACRO_BEGIN { \
751 int64_t __offset = (ix) - (ut)->chunkNativeStart; \
752 if (__offset>=0 && __offset<(int64_t)(ut)->nativeIndexingLimit && (ut)->chunkContents[__offset]<0xdc00) { \
753 (ut)->chunkOffset=(int32_t)__offset; \
754 } else { \
755 utext_setNativeIndex((ut), (ix)); \
756 } \
757 } UPRV_BLOCK_MACRO_END
758
759
760
761 /************************************************************************************
762 *
763 * Functions related to writing or modifying the text.
764 * These will work only with modifiable UTexts. Attempting to
765 * modify a read-only UText will return an error status.
766 *
767 ************************************************************************************/
768
769
788 U_CAPI UBool U_EXPORT2
789 utext_isWritable(const UText *ut);
790
791
800 U_CAPI UBool U_EXPORT2
801 utext_hasMetaData(const UText *ut);
802
803
831 U_CAPI int32_t U_EXPORT2
832 utext_replace(UText *ut,
833 int64_t nativeStart, int64_t nativeLimit,
834 const UChar *replacementText, int32_t replacementLength,
835 UErrorCode *status);
836
837
838
871 U_CAPI void U_EXPORT2
872 utext_copy(UText *ut,
873 int64_t nativeStart, int64_t nativeLimit,
874 int64_t destIndex,
875 UBool move,
876 UErrorCode *status);
877
878
900 U_CAPI void U_EXPORT2
901 utext_freeze(UText *ut);
902
903
910 enum {
915 UTEXT_PROVIDER_LENGTH_IS_EXPENSIVE = 1,
922 UTEXT_PROVIDER_STABLE_CHUNKS = 2,
929 UTEXT_PROVIDER_WRITABLE = 3,
935 UTEXT_PROVIDER_HAS_META_DATA = 4,
943 UTEXT_PROVIDER_OWNS_TEXT = 5
944 };
945
983 typedef UText * U_CALLCONV
984 UTextClone(UText *dest, const UText *src, UBool deep, UErrorCode *status);
985
986
995 typedef int64_t U_CALLCONV
996 UTextNativeLength(UText *ut);
997
1023 typedef UBool U_CALLCONV
1024 UTextAccess(UText *ut, int64_t nativeIndex, UBool forward);
1025
1053 typedef int32_t U_CALLCONV
1054 UTextExtract(UText *ut,
1055 int64_t nativeStart, int64_t nativeLimit,
1056 UChar *dest, int32_t destCapacity,
1057 UErrorCode *status);
1058
1088 typedef int32_t U_CALLCONV
1089 UTextReplace(UText *ut,
1090 int64_t nativeStart, int64_t nativeLimit,
1091 const UChar *replacementText, int32_t replacmentLength,
1092 UErrorCode *status);
1093
1122 typedef void U_CALLCONV
1123 UTextCopy(UText *ut,
1124 int64_t nativeStart, int64_t nativeLimit,
1125 int64_t nativeDest,
1126 UBool move,
1127 UErrorCode *status);
1128
1142 typedef int64_t U_CALLCONV
1143 UTextMapOffsetToNative(const UText *ut);
1144
1160 typedef int32_t U_CALLCONV
1161 UTextMapNativeIndexToUTF16(const UText *ut, int64_t nativeIndex);
1162
1163
1181 typedef void U_CALLCONV
1182 UTextClose(UText *ut);
1183
1184
1194 struct UTextFuncs {
1209 int32_t tableSize;
1210
1216 int32_t reserved1, reserved2, reserved3;
1217
1218
1225 UTextClone *clone;
1226
1234 UTextNativeLength *nativeLength;
1235
1242 UTextAccess *access;
1243
1250 UTextExtract *extract;
1251
1258 UTextReplace *replace;
1259
1266 UTextCopy *copy;
1267
1274 UTextMapOffsetToNative *mapOffsetToNative;
1275
1282 UTextMapNativeIndexToUTF16 *mapNativeIndexToUTF16;
1283
1290 UTextClose *close;
1291
1296 UTextClose *spare1;
1297
1302 UTextClose *spare2;
1303
1308 UTextClose *spare3;
1309
1310 };
1315 typedef struct UTextFuncs UTextFuncs;
1316
1328 struct UText {
1341 uint32_t magic;
1342
1343
1349 int32_t flags;
1350
1351
1357 int32_t providerProperties;
1358
1365 int32_t sizeOfStruct;
1366
1367 /* ------ 16 byte alignment boundary ----------- */
1368
1369
1375 int64_t chunkNativeLimit;
1376
1381 int32_t extraSize;
1382
1390 int32_t nativeIndexingLimit;
1391
1392 /* ---- 16 byte alignment boundary------ */
1393
1398 int64_t chunkNativeStart;
1399
1405 int32_t chunkOffset;
1406
1411 int32_t chunkLength;
1412
1413 /* ---- 16 byte alignment boundary-- */
1414
1415
1422 const UChar *chunkContents;
1423
1428 const UTextFuncs *pFuncs;
1429
1435 void *pExtra;
1436
1443 const void *context;
1444
1445 /* --- 16 byte alignment boundary--- */
1446
1452 const void *p;
1458 const void *q;
1464 const void *r;
1465
1471 void *privP;
1472
1473
1474 /* --- 16 byte alignment boundary--- */
1475
1476
1482 int64_t a;
1483
1489 int32_t b;
1490
1496 int32_t c;
1497
1498 /* ---- 16 byte alignment boundary---- */
1499
1500
1506 int64_t privA;
1512 int32_t privB;
1518 int32_t privC;
1519 };
1520
1521
1538 U_CAPI UText * U_EXPORT2
1539 utext_setup(UText *ut, int32_t extraSpace, UErrorCode *status);
1540
1541 // do not use #ifndef U_HIDE_INTERNAL_API around the following!
1547 enum {
1548 UTEXT_MAGIC = 0x345ad82c
1549 };
1550
1558 #define UTEXT_INITIALIZER { \
1559 UTEXT_MAGIC, /* magic */ \
1560 0, /* flags */ \
1561 0, /* providerProps */ \
1562 sizeof(UText), /* sizeOfStruct */ \
1563 0, /* chunkNativeLimit */ \
1564 0, /* extraSize */ \
1565 0, /* nativeIndexingLimit */ \
1566 0, /* chunkNativeStart */ \
1567 0, /* chunkOffset */ \
1568 0, /* chunkLength */ \
1569 NULL, /* chunkContents */ \
1570 NULL, /* pFuncs */ \
1571 NULL, /* pExtra */ \
1572 NULL, /* context */ \
1573 NULL, NULL, NULL, /* p, q, r */ \
1574 NULL, /* privP */ \
1575 0, 0, 0, /* a, b, c */ \
1576 0, 0, 0 /* privA,B,C, */ \
1577 }
1578
1579
1580 U_CDECL_END
1581
1582
1583 #if U_SHOW_CPLUSPLUS_API
1584
1585 U_NAMESPACE_BEGIN
1586
1596 U_DEFINE_LOCAL_OPEN_POINTER(LocalUTextPointer, UText, utext_close);
1597
1598 U_NAMESPACE_END
1599
1600 #endif
1601
1602
1603 #endif
utext_hasMetaData
U_CAPI UBool utext_hasMetaData(const UText *ut)
Test whether there is meta data associated with the text.
UTextCopy
void UTextCopy(UText *ut, int64_t nativeStart, int64_t nativeLimit, int64_t nativeDest, UBool move, UErrorCode *status)
Function type declaration for UText.copy().
Definition: utext.h:1123
utypes.h
Basic definitions for ICU, for both C and C++ APIs.
utext_setNativeIndex
U_CAPI void utext_setNativeIndex(UText *ut, int64_t nativeIndex)
Set the current iteration position to the nearest code point boundary at or preceding the specified i...
UTextReplace
int32_t UTextReplace(UText *ut, int64_t nativeStart, int64_t nativeLimit, const UChar *replacementText, int32_t replacmentLength, UErrorCode *status)
Function type declaration for UText.replace().
Definition: utext.h:1089
UTEXT_PROVIDER_STABLE_CHUNKS
@ UTEXT_PROVIDER_STABLE_CHUNKS
Text chunks remain valid and usable until the text object is modified or deleted, not just until the ...
Definition: utext.h:922
UBool
int8_t UBool
The ICU boolean type, a signed-byte integer.
Definition: umachine.h:269
utext_openConstUnicodeString
U_CAPI UText * utext_openConstUnicodeString(UText *ut, const icu::UnicodeString *s, UErrorCode *status)
Open a UText for a const UnicodeString.
UTextFuncs::spare3
UTextClose * spare3
(private) Spare function pointer
Definition: utext.h:1308
utext_replace
U_CAPI int32_t utext_replace(UText *ut, int64_t nativeStart, int64_t nativeLimit, const UChar *replacementText, int32_t replacementLength, UErrorCode *status)
Replace a range of the original text with a replacement text.
UTextNativeLength
int64_t UTextNativeLength(UText *ut)
Function type declaration for UText.nativeLength().
Definition: utext.h:996
UText::providerProperties
int32_t providerProperties
Text provider properties.
Definition: utext.h:1357
icu::Replaceable
Replaceable is an abstract base class representing a string of characters that supports the replaceme...
Definition: rep.h:77
UTextFuncs::clone
UTextClone * clone
(public) Function pointer for UTextClone
Definition: utext.h:1225
UText::nativeIndexingLimit
int32_t nativeIndexingLimit
(protected) The highest chunk offset where native indexing and chunk (UTF-16) indexing correspond.
Definition: utext.h:1390
U_CALLCONV
#define U_CALLCONV
Definition: platform.h:870
UTextFuncs::nativeLength
UTextNativeLength * nativeLength
(public) function pointer for UTextLength May be expensive to compute!
Definition: utext.h:1234
UText::chunkNativeStart
int64_t chunkNativeStart
(protected) Native index of the first character in the text chunk.
Definition: utext.h:1398
utext_clone
U_CAPI UText * utext_clone(UText *dest, const UText *src, UBool deep, UBool readOnly, UErrorCode *status)
Clone a UText.
UTextFuncs::access
UTextAccess * access
(public) Function pointer for UTextAccess.
Definition: utext.h:1242
utext_isWritable
U_CAPI UBool utext_isWritable(const UText *ut)
Return true if the text can be written (modified) with utext_replace() or utext_copy().
utext_char32At
U_CAPI UChar32 utext_char32At(UText *ut, int64_t nativeIndex)
Returns the code point at the requested index, or U_SENTINEL (-1) if it is out of bounds.
UTextFuncs::mapNativeIndexToUTF16
UTextMapNativeIndexToUTF16 * mapNativeIndexToUTF16
(public) Function pointer for UTextMapNativeIndexToUTF16.
Definition: utext.h:1282
utext_openUTF8
U_CAPI UText * utext_openUTF8(UText *ut, const char *s, int64_t length, UErrorCode *status)
Open a read-only UText implementation for UTF-8 strings.
utext_getNativeIndex
U_CAPI int64_t utext_getNativeIndex(const UText *ut)
Get the current iterator position, which can range from 0 to the length of the text.
utext_openReplaceable
U_CAPI UText * utext_openReplaceable(UText *ut, icu::Replaceable *rep, UErrorCode *status)
Open a writable UText implementation for an ICU Replaceable object.
UTextFuncs::reserved1
int32_t reserved1
(private) Alignment padding.
Definition: utext.h:1216
UText::privC
int32_t privC
Private field reserved for future use by the UText framework itself.
Definition: utext.h:1518
UTextClone
UText * UTextClone(UText *dest, const UText *src, UBool deep, UErrorCode *status)
Function type declaration for UText.clone().
Definition: utext.h:984
UTextFuncs::close
UTextClose * close
(public) Function pointer for UTextClose.
Definition: utext.h:1290
UTextMapNativeIndexToUTF16
int32_t UTextMapNativeIndexToUTF16(const UText *ut, int64_t nativeIndex)
Function type declaration for UText.mapIndexToUTF16().
Definition: utext.h:1161
utext_copy
U_CAPI void utext_copy(UText *ut, int64_t nativeStart, int64_t nativeLimit, int64_t destIndex, UBool move, UErrorCode *status)
Copy or move a substring from one position to another within the text, while retaining any metadata a...
utext_nativeLength
U_CAPI int64_t utext_nativeLength(UText *ut)
Get the length of the text.
utext_close
U_CAPI UText * utext_close(UText *ut)
Close function for UText instances.
utext_openCharacterIterator
U_CAPI UText * utext_openCharacterIterator(UText *ut, icu::CharacterIterator *ci, UErrorCode *status)
Open a UText implementation over an ICU CharacterIterator.
icu::UnicodeString
UnicodeString is a string class that stores Unicode characters directly and provides similar function...
Definition: unistr.h:295
UTextFuncs::tableSize
int32_t tableSize
(public) Function table size, sizeof(UTextFuncs) Intended for use should the table grow to accommodat...
Definition: utext.h:1209
UText::q
const void * q
(protected) Pointer fields available for use by the text provider.
Definition: utext.h:1458
UTextFuncs
(public) Function dispatch table for UText.
Definition: utext.h:1194
UText::chunkLength
int32_t chunkLength
(protected) Length the text chunk (UTF-16 buffer), in UChars.
Definition: utext.h:1411
UChar32
int32_t UChar32
Define UChar32 as a type for single Unicode code points.
Definition: umachine.h:467
utext_equals
U_CAPI UBool utext_equals(const UText *a, const UText *b)
Compare two UText objects for equality.
UText::a
int64_t a
(protected) Integer field reserved for use by the text provider.
Definition: utext.h:1482
utext_next32
U_CAPI UChar32 utext_next32(UText *ut)
Get the code point at the current iteration position of the UText, and advance the position to the fi...
UTextFuncs::copy
UTextCopy * copy
(public) Function pointer for UTextCopy.
Definition: utext.h:1266
UErrorCode
UErrorCode
Standard ICU4C error code type, a substitute for exceptions.
Definition: utypes.h:415
utext_freeze
U_CAPI void utext_freeze(UText *ut)
utext_openUnicodeString
U_CAPI UText * utext_openUnicodeString(UText *ut, icu::UnicodeString *s, UErrorCode *status)
Open a writable UText for a non-const UnicodeString.
UText::b
int32_t b
(protected) Integer field reserved for use by the text provider.
Definition: utext.h:1489
UTextFuncs::extract
UTextExtract * extract
(public) Function pointer for UTextExtract.
Definition: utext.h:1250
UText::privP
void * privP
Private field reserved for future use by the UText framework itself.
Definition: utext.h:1471
UTextFuncs::reserved3
int32_t reserved3
Definition: utext.h:1216
utext_isLengthExpensive
U_CAPI UBool utext_isLengthExpensive(const UText *ut)
Return true if calculating the length of the text could be expensive.
UTEXT_PROVIDER_WRITABLE
@ UTEXT_PROVIDER_WRITABLE
The provider supports modifying the text via the replace() and copy() functions.
Definition: utext.h:929
U_CDECL_END
#define U_CDECL_END
Definition: umachine.h:86
UText::pExtra
void * pExtra
(protected) Pointer to additional space requested by the text provider during the utext_open operatio...
Definition: utext.h:1435
U_CDECL_BEGIN
#define U_CDECL_BEGIN
Definition: umachine.h:85
utext_next32From
U_CAPI UChar32 utext_next32From(UText *ut, int64_t nativeIndex)
Set the iteration index and return the code point at that index.
UText
UText struct.
Definition: utext.h:1328
UText::chunkNativeLimit
int64_t chunkNativeLimit
(protected) Native index of the first character position following the current chunk.
Definition: utext.h:1375
UText::context
const void * context
(protected) Pointer to string or text-containing object or similar.
Definition: utext.h:1443
utext_current32
U_CAPI UChar32 utext_current32(UText *ut)
Get the code point at the current iteration position, or U_SENTINEL (-1) if the iteration has reached...
UTextFuncs::spare2
UTextClose * spare2
(private) Spare function pointer
Definition: utext.h:1302
U_DEFINE_LOCAL_OPEN_POINTER
#define U_DEFINE_LOCAL_OPEN_POINTER(LocalPointerClassName, Type, closeFunction)
Definition: localpointer.h:550
icu::CharacterIterator
Abstract class that defines an API for iteration on text objects.
Definition: chariter.h:361
utext_openUChars
U_CAPI UText * utext_openUChars(UText *ut, const UChar *s, int64_t length, UErrorCode *status)
Open a read-only UText for UChar * string.
UText::p
const void * p
(protected) Pointer fields available for use by the text provider.
Definition: utext.h:1452
UText::magic
uint32_t magic
Definition: utext.h:1341
UText::pFuncs
const UTextFuncs * pFuncs
(public) Pointer to Dispatch table for accessing functions for this UText.
Definition: utext.h:1428
UText::sizeOfStruct
int32_t sizeOfStruct
(public) sizeOfStruct=sizeof(UText) Allows possible backward compatible extension.
Definition: utext.h:1365
utext_previous32From
U_CAPI UChar32 utext_previous32From(UText *ut, int64_t nativeIndex)
Set the iteration index, and return the code point preceding the one specified by the initial index.
UTextExtract
int32_t UTextExtract(UText *ut, int64_t nativeStart, int64_t nativeLimit, UChar *dest, int32_t destCapacity, UErrorCode *status)
Function type declaration for UText.extract().
Definition: utext.h:1054
localpointer.h
C++ API: "Smart pointers" for use with and in ICU4C C++ code.
UText::privB
int32_t privB
Private field reserved for future use by the UText framework itself.
Definition: utext.h:1512
UTEXT_PROVIDER_HAS_META_DATA
@ UTEXT_PROVIDER_HAS_META_DATA
There is meta data associated with the text.
Definition: utext.h:935
UTextFuncs::reserved2
int32_t reserved2
Definition: utext.h:1216
chariter.h
C++ API: Character Iterator.
UTextFuncs::replace
UTextReplace * replace
(public) Function pointer for UTextReplace.
Definition: utext.h:1258
utext_getPreviousNativeIndex
U_CAPI int64_t utext_getPreviousNativeIndex(UText *ut)
Get the native index of the character preceding the current position.
UText::extraSize
int32_t extraSize
(protected) Size in bytes of the extra space (pExtra).
Definition: utext.h:1381
rep.h
C++ API: Replaceable String.
UText::privA
int64_t privA
Private field reserved for future use by the UText framework itself.
Definition: utext.h:1506
UTextAccess
UBool UTextAccess(UText *ut, int64_t nativeIndex, UBool forward)
Function type declaration for UText.access().
Definition: utext.h:1024
uchar.h
C API: Unicode Properties.
UTEXT_PROVIDER_LENGTH_IS_EXPENSIVE
@ UTEXT_PROVIDER_LENGTH_IS_EXPENSIVE
It is potentially time consuming for the provider to determine the length of the text.
Definition: utext.h:915
LocalUTextPointer
UChar
char16_t UChar
Definition: umachine.h:418
utext_extract
U_CAPI int32_t utext_extract(UText *ut, int64_t nativeStart, int64_t nativeLimit, UChar *dest, int32_t destCapacity, UErrorCode *status)
Extract text from a UText into a UChar buffer.
UTextFuncs::mapOffsetToNative
UTextMapOffsetToNative * mapOffsetToNative
(public) Function pointer for UTextMapOffsetToNative.
Definition: utext.h:1274
UTextFuncs::spare1
UTextClose * spare1
(private) Spare function pointer
Definition: utext.h:1296
UTEXT_PROVIDER_OWNS_TEXT
@ UTEXT_PROVIDER_OWNS_TEXT
Text provider owns the text storage.
Definition: utext.h:943
U_CAPI
#define U_CAPI
This is used to declare a function as a public ICU C API.
Definition: umachine.h:110
UText::flags
int32_t flags
Definition: utext.h:1349
utext_previous32
U_CAPI UChar32 utext_previous32(UText *ut)
Move the iterator position to the character (code point) whose index precedes the current position,...
UText::r
const void * r
(protected) Pointer fields available for use by the text provider.
Definition: utext.h:1464
utext_moveIndex32
U_CAPI UBool utext_moveIndex32(UText *ut, int32_t delta)
Move the iterator position by delta code points.
UText::chunkOffset
int32_t chunkOffset
(protected) Current iteration position within the text chunk (UTF-16 buffer).
Definition: utext.h:1405
unistr.h
C++ API: Unicode String.
UText::c
int32_t c
(protected) Integer field reserved for use by the text provider.
Definition: utext.h:1496
UTextClose
void UTextClose(UText *ut)
Function type declaration for UText.utextClose().
Definition: utext.h:1182
UTextMapOffsetToNative
int64_t UTextMapOffsetToNative(const UText *ut)
Function type declaration for UText.mapOffsetToNative().
Definition: utext.h:1143
utext_setup
U_CAPI UText * utext_setup(UText *ut, int32_t extraSpace, UErrorCode *status)
Common function for use by Text Provider implementations to allocate and/or initialize a new UText st...
UText::chunkContents
const UChar * chunkContents
(protected) pointer to a chunk of text in UTF-16 format.
Definition: utext.h:1422